ip: Add unformat for flow_hash_config

Type: improvement

This also makes the is_white_space function
public

Change-Id: Ifc1c0d4509f3ecae14f09bb5fa7a2eea33c49b09
Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
diff --git a/src/vnet/ip/lookup.h b/src/vnet/ip/lookup.h
index 48ba468..aa99827 100644
--- a/src/vnet/ip/lookup.h
+++ b/src/vnet/ip/lookup.h
@@ -162,7 +162,7 @@
 } ip_lookup_main_t;
 
 u8 *format_ip_flow_hash_config (u8 * s, va_list * args);
-
+uword unformat_ip_flow_hash_config (unformat_input_t *input, va_list *args);
 
 always_inline void
 ip_lookup_set_buffer_fib_index (u32 * fib_index_by_sw_if_index,